Demountable gun sight



GR 296029230 SR July 8, 1952 0. w. BOUGHTON ET AL 2, 02,230

DEMOUNTABLE GUN SIGHT Filed March 1, 1950 F cs. 2

INVENTORS OLIN W. BOUGHTON & ROBERT S. FILSINGER ATTORNEY Patented July 8, 1952 UNITED STATES PATENT OFFICE DEMOUNTABLE GUN SIGHT Application March 1, 1950, Serial No. 147,104

3 Claims.

This invention relates to gun sighting devices and more particularly to the quickly-demountable types of such devices whereby various forms of sights may be used interchangeably.

One of the objects of this invention is to provide a novel and simple sighting device for guns which may be quickly adjusted, and mounted or demounted.

Another object is to provide such a device which is economical to manufacture and which is strongly constructed to maintain its sighting axis in good preset alignment with the gun throughout repeated mountings and demountings of the device.

Further objects and advantages may be found in the novel arrangement and combination of parts of this device as set forth hereinafter in the specification and as represented in the accompanying drawing wherein:

Fig. 1 is a side elevation of a preferred form of gun sight embodying our invention,

Fig. 2 is a plan view of same, and

Fig. 3 is an exploded perspective view' of the parts of same.

In Fig. 1 of the drawing, there is fragmentarily shown a gun barrel l wherein there is a breech opening through which discharged shells are ejected in the customary manner. At either end of opening front and rear brackets l2 and I3 respectively are fixed to the gun barrel by suitable means such as the screws illustrated. In the brackets 2 and 3 are held a pair of laterally-arranged cylindrical anchor rods l 4 and I5. respectively, to which a sighting device, such as a telescope, not shown, may be secured. The cylindrical portions of rods I4 and I5 terminate, respectively, in vertical shoulders l3, l1 and l8, l3 between which the securing means for the sighting device is confined to prevent relative lateral motion of the device. The present invention does not reside in the above-described mechanism which is covered by the patent application, Serial No. 87,234, of Donald T. Street, filed April 13, 1949.

Our novel mechanical sighting device is intended to be used interchangeably with the above-mentioned sighting telescope on the same brackets, and it is shown generally at 20 in the drawing. It comprises a supporting bar 2| on which is mounted by means of a spring blade 23 a suitable sighting element such as an aperture sight 22. An upturned portion 24 is provided on blade 23 at the rear end having a horizontally threaded hole 24' in which a threaded extension 25 on the sight 22 is threaded. The front end of the spring blade 23 is secured to the bar 2| by a screw 26 and a rivet 21 which are anchored in the bar.

To provide lateral adjustments of the sight 22, there is formed an oversized hole 28 in the blade 23 through which the screw 26 projects so as to allow the blade some freedom to swing about the rivet 21. For elevational adjustments, the blade 23 is bent at 29 and 29' so as to lie at an acute angle with respect to the bar 2| and a lifting button 30 is arranged to slide along beneath the blade in contact with bar 2 I. To maintain the button normally crosswise of the blade 23, it is provided with a fiat groove 30 which slidingly fits said blade. A slidable attachment for adjustably fixing button 30 to blade 23 is provided by forming an elongated slot 3| in the blade through which a locking screw 32 is passed and threaded into the button to lock it in place.

For demountably clamping the rear end of bar 2| to anchor rod I5, a hook-like spring fork 33 is formed on the bar 2| by bending upwardly a pair of hooks 34 and 34' so as to extend rearwardly over the anchor rod. A lower jaw 35 on the fork extends straight out from bar 2| substantially parallel to the rearwardly extending hooks 34 and 34' and all these extensions 34, 34' 35 are so formed from spring-like material that they grip the rod l5 tightly between them while permitting relative motion in a plane parallel to the sighting axis. At the front end of the bar 2 I, an inverted loop 36 is preferably formed overlying and closely fitting around the rod |4 so as to support the front end of the bar and prevent it from moving endwise. To look the loop 35 onto its anchor rod l4, there is provided a mechanism comprising a slidable jaw 31 which may be moved into tight clamping position against the underside of rod l4. The jaw 31 is made of flat metal material and on its front end a narrow nose 38 is formed so that it protrudes through a guide opening 39 in the loop 36. The jaw 31 is mounted for sliding motion along the upper surface of the blade 23 by forming in the jaw an elongated slot 40 through which extends the rivet 21 that holds the blade 23 so as to secure said jaw in place. Both the slot 40 and. the opening 39 serve as directional guides for the slidable jaw 31, and the rivet 21 performs double duty by acting as pivot for the blade 23 and retainer for said jaw. An upturned tab 4| is provided at the rear end of the slidable jaw 31 by which it may be moved. Both the fork 33 and loop 38 fit snugly between their respective pairs of shoulders l6, l1 and l8, I! so that lateral motion of the sighting device 20 relative to the anchor rods I 4 and I5 is prevented.

In assembling the sighting device 20 on the gun barrel ill, the spring fork 33 is first pressed over the-anchor rod I5 and then the front end of the device is lowered to engage the loop 36 on anchor rod I4. Next, the jaw 31 is slid under the rod M to establish clamping pressure between the loop 36 and the jaw. These simple operations will reliably position the sighting device in operative position.

Windage adjustments to the sighting axis are performed by loosening the screw 26, moving the blade 23 laterally the desired amount and retightening the screw. Elevational adjustments are simply made by loosening screw 32, movin the wedge button 30 to the desired setting and retightening the screw.

From the foregoing description, it will be seen that there is here disclosed a simple and economical sighting device which may be quickly and easily mounted on a gun and adjusted for correct sighting position in accordance with the objects of this invention. Although but one embodiment of our invention has been shown and described in detail, it will be understood that changes may be made in the form and arrangement of the parts and substitutions may be made therein without departing from the spirit of the invention as defined by the following claims.

We claim:

1. A demountable gun sighting device adapted for use interchangeably'with a sighting telescope in a gun telescope mounting having a pair of spaced lateral anchor rods on which said telescope and device may be detachably secured, said device comprising the combination of a supporting bar on one end of which is formed a spring fork having prongs that grip one of said rods, an inverted hook formed on the other end or said bar so as to overlie the other of said rods, a clamping member movably attached to said bar so as 2. A gun sighting device adapted to be detachably secured to a mounting which is attached to a gun and comprises a pair of spaced, laterally extending rods, said device comprising a supporting bar, one end of said bar having a pair of fingers extending upwardly and forwardly and in engagement with the top side of one of said rods, a second finger extendingforwardly and in engagement with the under side of said last named rod, the other end of the bar having an inverted hook adapted to hook over the other rod, a blade mounted on said bar for lateral adjustments, said blade having a vertically ofi-set portion, a sighting device carried by the blade and means for adjusting said portion in a vertical plane.

3. In a gun sight, the combination of a support bar, a blade having one end pivotally mounted for lateral movement on said bar, said blade having a vertically off-set portion provided with a. slot, means for limiting lateral movement of said blade comprising a screw extending through an oversize hole in the blade and threaded into the support bar, said blade having an upright portion at its other end, a sighting element carried by said upright portion and means for vertically ad.- justin the sighting element comprising a block positioned under the vertically oif-set portion of the blade and slidably mounted on the support bar, and a screw passing through said slot and threaded into the block.

OLIN W. BOUGH'ION. ROBERT S. FILSINGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,073,231 Harrison Sept. 16, 1913 1,229,652 Paulson June 12, 1917 1,256,936 Shaver Feb. 19, 1918 2,132,490 Mossberg Oct. 11, 1938 2,306,997 Burrell Dec. 29, .1942 2,457,294 Wood Dec. 28, 1948 

